MTK 多帧算法集成实现流程

于 2024-02-05 07:55:29 发布
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和你一起终身学习，这里是程序员Android
本文链接：https://blog.youkuaiyun.com/wjky2014/article/details/136050112

7f39b7d5dea60c2c775bbcd5fbd71178.gif

和你一起终身学习，这里是程序员Android

经典好文推荐，通过阅读本文，您将收获以下知识点:

一、选择feature和配置feature table
二、 挂载算法
三、自定义metadata
四、APP调用算法
五、结语

一、选择feature和配置feature table

1.1 选择feature

多帧降噪算法(MFNR)是一种很常见的多帧算法，在MTK已预置的feature中有MTK_FEATURE_MFNR和TP_FEATURE_MFNR。因此，我们可以对号入座，不用再额外添加feature。这里我们是第三方算法，所以我们选择TP_FEATURE_MFNR。

1.2 配置feature table

确定了feature为TP_FEATURE_MFNR后，我们还需要将其添加到feature table中：

diff --git a/vendor/mediatek/proprietary/hardware/mtkcam3/3rdparty/mtk/mtk_scenario_mgr.cpp b/vendor/mediatek/proprietary/hardware/mtkcam3/3rdparty/mtk/mtk_scenario_mgr.cpp
index f14ff8a6e2..38365e0602 100755
--- a/vendor/mediatek/proprietary/hardware/mtkcam3/3rdparty/mtk/mtk_scenario_mgr.cpp
+++ b/vendor/mediatek/proprietary/hardware/mtkcam3/3rdparty/mtk/mtk_scenario_mgr.cpp
@@ -106,6 +106,7 @@ using namespace NSCam::v3::pipeline::policy::scenariomgr;
 #define MTK_FEATURE_COMBINATION_TP_VSDOF_MFNR     (MTK_FEATURE_MFNR    | MTK_FEATURE_NR| MTK_FEATURE_ABF| MTK_FEATURE_CZ| MTK_FEATURE_DRE| MTK_FEATURE_HFG| MTK_FEATURE_DCE | MTK_FEATURE_FB| TP_FEATURE_VSDOF| TP_FEATURE_WATERMARK)
 #define MTK_FEATURE_COMBINATION_TP_FUSION         (NO_FEATURE_NORMAL   | MTK_FEATURE_NR| MTK_FEATURE_ABF| MTK_FEATURE_CZ| MTK_FEATURE_DRE| MTK_FEATURE_HFG| MTK_FEATURE_DCE | MTK_FEATURE_FB| TP_FEATURE_FUSION| TP_FEATURE_WATERMARK)
 #define MTK_FEATURE_COMBINATION_TP_PUREBOKEH      (NO_FEATURE_NORMAL   | MTK_FEATURE_NR| MTK_FEATURE_ABF| MTK_FEATURE_CZ| MTK_FEATURE_DRE| MTK_FEATURE_HFG| MTK_FEATURE_DCE | MTK_FEATURE_FB| TP_FEATURE_PUREBOKEH| TP_FEATURE_WATERMARK)
+#define MTK_FEATURE_COMBINATION_TP_MFNR           (TP_FEATURE_MFNR     | MTK_FEATURE_NR| MTK_FEATURE_ABF| MTK_FEATURE_CZ| MTK_FEATURE_DRE| MTK_FEATURE_HFG| MTK_FEATURE_DCE | MTK_FEATURE_FB| MTK_FEATURE_MFNR)

 // streaming feature combination (TODO: it should be refined by streaming scenario feature)
 #define MTK_FEATURE_COMBINATION_VIDEO_NORMAL     (MTK_FEATURE_FB|TP_FEATURE_FB|TP_FEATURE_WATERMARK)
@@ -136,6 +137,7 @@ const std::vector<std::unordered_map<int32_t, ScenarioFeatures>>  gMtkScenarioFe
         ADD_CAMERA_FEATURE_SET(TP_FEATURE_HDR,       MTK_FEATURE_COMBINATION_HDR)
         ADD_CAMERA_FEATURE_SET(MTK_FEATURE_AINR,     MTK_FEATURE_COMBINATION_AINR)
         ADD_CAMERA_FEATURE_SET(MTK_FEATURE_MFNR,     MTK_FEATURE_COMBINATION_MFNR)
+        ADD_CAMERA_FEATURE_SET(TP_FEATURE_MFNR,      MTK_FEATURE_COMBINATION_TP_MFNR)
         ADD_CAMERA_FEATURE_SET(MTK_FEATURE_REMOSAIC, MTK_FEATURE_COMBINATION_REMOSAIC)
         ADD_CAMERA_FEATURE_SET(NO_FEATURE_NORMAL,    MTK_FEATURE_COMBINATION_SINGLE)
         CAMERA_SCENARIO_END

注意：

MTK在Android Q（10.0）及更高版本上优化了scenario配置表的客制化，Android Q及更高版本，feature需要在：
vendor/mediatek/proprietary/custom/[platform]/hal/camera/camera_custom_feature_table.cpp中配置，[platform]是诸如mt6580，mt6763之类的。

二、 挂载算法

2.1 为算法选择plugin

MTK HAL3在vendor/mediatek/proprietary/hardware/mtkcam3/include/mtkcam3/3rdparty/plugin/PipelinePluginType.h 中将三方算法的挂载点大致分为以下几类：

  • BokehPlugin：Bokeh算法挂载点，双摄景深算法的虚化部分。

  • DepthPlugin：Depth算法挂载点，双摄景深算法的计算深度部分。

  • FusionPlugin：Depth和Bokeh放在1个算法中，即合并的双摄景深算法挂载点。

  • JoinPlugin：Streaming相关算法挂载点，预览算法都挂载在这里。

  • MultiFramePlugin：多帧算法挂载点，包括YUV与RAW，例如MFNR/HDR

  • RawPlugin：RAW算法挂载点，例如remosaic

  • YuvPlugin：Yuv单帧算法挂载点，例如美颜、广角镜头畸变校正等。

对号入座，为要集成的算法选择相应的plugin。这里是多帧算法，只能选择MultiFramePlugin。并且，一般情况下多帧算法只用于拍照，不用于预览。

2.2 添加全局宏控

为了能控制某个项目是否集成此算法，我们在device/mediateksample/[platform]/ProjectConfig.mk中添加一个宏，用于控制新接入算法的编译：

QXT_MFNR_SUPPORT = yes

当某个项目不需要这个算法时，将device/mediateksample/[platform]/ProjectConfig.mk的QXT_MFNR_SUPPORT的值设为 no 就可以了。

2.3 编写算法集成文件

参照vendor/mediatek/proprietary/hardware/mtkcam3/3rdparty/mtk/mfnr/MFNRImpl.cpp中实现MFNR拍照。目录结构如下：
vendor/mediatek/proprietary/hardware/mtkcam3/3rdparty/customer/cp_tp_mfnr/
├── Android.mk
├── include
│ └── mf_processor.h
├── lib
│ ├── arm64-v8a
│ │ └── libmultiframe.so
│ └── armeabi-v7a
│ └── libmultiframe.so
└── MFNRImpl.cpp

文件说明：

  • Android.mk中配置算法库、头文件、集成的源代码MFNRImpl.cpp文件，将它们编译成库libmtkcam.plugin.tp_mfnr，供libmtkcam_3rdparty.customer依赖调用。

  • libmultiframe.so实现了将连续4帧图像缩小，并拼接成一张图的功能，libmultiframe.so用来模拟需要接入的第三方多帧算法库。mf_processor.h是头文件。

  • MFNRImpl.cpp是集成的源代码CPP文件。

2.3.1 mtkcam3/3rdparty/customer/cp_tp_mfnr/Android.mk
ifeq ($(QXT_MFNR_SUPPORT),yes)
LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE := libmultiframe
LOCAL_SRC_FILES_32 := lib/armeabi-v7a/libmultiframe.so
LOCAL_SRC_FILES_64 := lib/arm64-v8a/libmultiframe.so
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE_CLASS := SHARED_LIBRARIES
LOCAL_MODULE_SUFFIX := .so
LOCAL_PROPRIETARY_MODULE := true
LOCAL_MULTILIB := both
include $(BUILD_PREBUILT)

################################################################################
#
################################################################################
include $(CLEAR_VARS)

#-----------------------------------------------------------
-include $(TOP)/$(MTK_PATH_SOURCE)/hardware/mtkcam/mtkcam.mk

#-----------------------------------------------------------
LOCAL_SRC_FILES += MFNRImpl.cpp

#-----------------------------------------------------------
LOCAL_C_INCLUDES += $(MTKCAM_C_INCLUDES)
LOCAL_C_INCLUDES += $(TOP)/$(MTK_PATH_SOURCE)/hardware/mtkcam3/include $(MTK_PATH_SOURCE)/hardware/mtkcam/include
LOCAL_C_INCLUDES += $(TOP)/$(MTK_PATH_COMMON)/hal/inc
LOCAL_C_INCLUDES += $(TOP)/$(MTK_PATH_CUSTOM_PLATFORM)/hal/inc
LOCAL_C_INCLUDES += $(TOP)/external/libyuv/files/include/
LOCAL_C_INCLUDES += $(TOP)/$(MTK_PATH_SOURCE)/hardware/mtkcam3/3rdparty/customer/cp_tp_mfnr/include
#
LOCAL_C_INCLUDES += system/media/camera/include

#-----------------------------------------------------------
LOCAL_CFLAGS += $(MTKCAM_CFLAGS)
#

#-----------------------------------------------------------
LOCAL_STATIC_LIBRARIES +=
#
LOCAL_WHOLE_STATIC_LIBRARIES +=

#-----------------------------------------------------------
LOCAL_SHARED_LIBRARIES += liblog
LOCAL_SHARED_LIBRARIES += libutils
LOCAL_SHARED_LIBRARIES += libcutils
LOCAL_SHARED_LIBRARIES += libmtkcam_modulehelper
LOCAL_SHARED_LIBRARIES += libmtkcam_stdutils
LOCAL_SHARED_LIBRARIES += libmtkcam_pipeline
LOCAL_SHARED_LIBRARIES += libmtkcam_metadata
LOCAL_SHARED_LIBRARIES += libmtkcam_metastore
LOCAL_SHARED_LIBRARIES += libmtkcam_streamutils
LOCAL_SHARED_LIBRARIES += libmtkcam_imgbuf
LOCAL_SHARED_LIBRARIES += libmtkcam_exif
#LOCAL_SHARED_LIBRARIES += libmtkcam_3rdparty

#-----------------------------------------------------------
LOCAL_HEADER_LIBRARIES := libutils_headers liblog_headers libhardware_headers

#-----------------------------------------------------------
LOCAL_MODULE := libmtkcam.plugin.tp_mfnr
LOCAL_PROPRIETARY_MODULE := true
LOCAL_MODULE_OWNER := mtk
LOCAL_MODULE_TAGS := optional
include $(MTK_STATIC_LIBRARY)

################################################################################
#
################################################################################
include $(call all-makefiles-under,$(LOCAL_PATH))
endif
2.3.2 mtkcam3/3rdparty/customer/cp_tp_mfnr/include/mf_processor.h
#ifndef QXT_MULTI_FRAME_H
#define QXT_MULTI_FRAME_H

class MFProcessor {

public:
    virtual ~MFProcessor() {}

    virtual void setFrameCount(int num) = 0;

    virtual void setParams() = 0;

    virtual void addFrame(unsigned char *src, int srcWidth, int srcHeight) = 0;

    virtual void addFrame(unsigned char *srcY, unsigned char *srcU, unsigned char *srcV,
            int srcWidth, int srcHeight) = 0;

    virtual void scale(unsigned char *src, int srcWidth, int srcHeight,
                       unsigned char *dst, int dstWidth, int dstHeight) = 0;

    virtual void process(unsigned char *output, int outputWidth, int outputHeight) = 0;

    virtual void process(unsigned char *outputY, unsigned char *outputU, unsigned char *outputV,
            int outputWidth, i
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